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-rw-r--r--net/dsa/netlink.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/net/dsa/netlink.c b/net/dsa/netlink.c
new file mode 100644
index 000000000..ecf9ed1de
--- /dev/null
+++ b/net/dsa/netlink.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright 2022 NXP
+ */
+#include <linux/netdevice.h>
+#include <net/rtnetlink.h>
+
+#include "dsa_priv.h"
+
+static const struct nla_policy dsa_policy[IFLA_DSA_MAX + 1] = {
+ [IFLA_DSA_MASTER] = { .type = NLA_U32 },
+};
+
+static int dsa_changelink(struct net_device *dev, struct nlattr *tb[],
+ struct nlattr *data[],
+ struct netlink_ext_ack *extack)
+{
+ int err;
+
+ if (!data)
+ return 0;
+
+ if (data[IFLA_DSA_MASTER]) {
+ u32 ifindex = nla_get_u32(data[IFLA_DSA_MASTER]);
+ struct net_device *master;
+
+ master = __dev_get_by_index(dev_net(dev), ifindex);
+ if (!master)
+ return -EINVAL;
+
+ err = dsa_slave_change_master(dev, master, extack);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static size_t dsa_get_size(const struct net_device *dev)
+{
+ return nla_total_size(sizeof(u32)) + /* IFLA_DSA_MASTER */
+ 0;
+}
+
+static int dsa_fill_info(struct sk_buff *skb, const struct net_device *dev)
+{
+ struct net_device *master = dsa_slave_to_master(dev);
+
+ if (nla_put_u32(skb, IFLA_DSA_MASTER, master->ifindex))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+struct rtnl_link_ops dsa_link_ops __read_mostly = {
+ .kind = "dsa",
+ .priv_size = sizeof(struct dsa_port),
+ .maxtype = IFLA_DSA_MAX,
+ .policy = dsa_policy,
+ .changelink = dsa_changelink,
+ .get_size = dsa_get_size,
+ .fill_info = dsa_fill_info,
+ .netns_refund = true,
+};